PNG_FREE_TRNS     479 png.c             if ((mask & PNG_FREE_TRNS) & info_ptr->free_me)
PNG_FREE_TRNS     939 pngread.c         if (png_ptr->free_me & PNG_FREE_TRNS)
PNG_FREE_TRNS     941 pngread.c         png_ptr->free_me &= ~PNG_FREE_TRNS;
PNG_FREE_TRNS     931 pngset.c              png_free_data(png_ptr, info_ptr, PNG_FREE_TRNS, 0);
PNG_FREE_TRNS     965 pngset.c             info_ptr->free_me |= PNG_FREE_TRNS;